Sectional crankshaft



. 4 Feb. 13, 1940- v T. E. MATTISON SECTIONAL CRANKSHAFT Filed March 14, 1959 man/As EMA 77/60.

e With thegforegoing Patented Feb. 13, 1940 omits!) STATE sEoTIoN L CRANKSHAFT Thomas E. Mattison, North-field, Minn, assignor of twenty-five per cent to Berm'a-n G. Kielmeyer,

Y and fifteen per cent to Albert J. St. Martin,

botli'jotFaribault, Minn.

; it Application-March 14, 1939, Serial Nb. 261,827

An object-of this inventionis' 'the construction inexpensive to manufacture, and which is relatively-easyxto repair because of the novel and peculiar constructions of the crank arms and the coniiectingimits therefor.

Another tob'ject'of the invention is the construction of a sectional crankshaft in which the connectingunits are each capableof being bodily removed longitudinally; of the shaft from off the particular pair'of-crank arms that said connecting-unitmnites: 3

g and other objects in view, the invention comprises certain novel constructions, combinations, and arrangements of parts,

, aswill-be hereinaiter fullydescribed, illustrated in the accompanying drawing, and more particularly pointed out in the appended. claims.

In the drawing: Y a Figure 1 is a view partly in elevation and partly in longitudinalsection of a sectional crankshaft constructed inaccordance with the present in vention.

Figure 2 .is an enlarged sectional view taken on line 2-2, Fig. 1, and showing some of the parts separated.

Figure 3" is anenlarged longitudinal sectional view of one of'fth'e connecting units, showing the parts separated. I V

Figure4 isan enlarged sectional view taken on a journal 2.

Referring; to the drawing, inwhich I have shown the preferred embodiment of my invention, I designates the front main journal and 2 v I Associated with jouri nal 2 is the fiy'wheel'flange 3. There are shownv is the rear main journal.

inFig'. 1 a plurality of primary crank arms 4 and a plurality ofauxiliary crank arms 5. Each two contiguous primary and auxiliary crank arms are connected by a connecting unit 6. Theextreme right hand auxiliary crank arm 5, nearest to the fly wheel flange 3 is mounted on a cone extension 1 of the journal 2. A bolt 8 extends through flange 3, journal 2, and-on theinner end of bolt 8 is a washer 9 and a nut l 0, whereby this extreme right hand crank arm is securely retained upon The contiguous central auxiliary crank arms 5 (Fig. 2) are'connected by meansof an integral sleeve 1 i, which extends from the auxiliary crank arm 5 as shown in Fig. 2; this sleeve H is pro- ;vided on its outer end with an integral cone I2,

which cone fits into the conical socket l3 formed .on the auxiliary crank arm 5., with a key slot l4,

e v H H scams. (Cue-597) f'ihis invention relates to asectionalcrankshaft;

Fig. 1.

formed in-said conicalsocket 13; this arrangement is'also clearly seen in. Fig. When'the vparts of Fig. 2 are assembled tightly, as shown:

inFig. 1, the cone extension i2 is in the conical socket i3 andthe washer liland nut H5 areion the threaded end of bolts H." A washer l8 isvon bolt I! against its head.

Each connecting unit ti and its; associated crank arms is f similarly constructed (there are shown four of these connecting units; '8) therefore, it

3). comprises a primary crank arm 4' which is provided with a conical socket-"l9, and socket i9 is provided with aslot thior receiving a spline or pin 2! (Fig. i).

I The auxiliary crank arm 5 15' provided with a large conical socket ,22 g it is to be will only be necessary to specifically describe one j connecting unit. The connecting units; (see larger end of socket 19 for the very special reason,hereinafter specified. The journal sleeve 23 comprises a cylindrical body 24 with an integral primary conical end- 25 and anintegral auxiliary conical end 28. Theprimary end 25 isjneces- ,sarily thicker for snugly fitting the socket Hi;

this cone end 25 islarger through than the auxiliary cone end 26; The cone end 25' is provided with an annular shoulder 27, which shoulder fits.

against-1 the side Wallrof the engaged crank arm; not so with the annular shoulder; 28 of the cone end 26, for shoulder 28 fits only. against end 29 (Fig.3) of the cone collar 30. Cone collar .30 is provided with a tapering outer wall 38 and with a This cone collar .fits snugly conical socket 32. upon the auxiliary cone end 26, With'the inner end of wall 3i registering with the outer face iof body 24, as clearly shownin Fig. 1.

necting unit, with washer 36 thereon, against the e A bolt 33 extends through the assembled parts of the consembled, thereby securely holding same in [an efiicient operating condition.

When any one of the connecting units requires inspection, or repair, the particular unit can be removed longitudinally of the sectional crankshaft, as is clearly illustrated by dotted lines A,

This permits of inspection or repair work of the particular connecting unit without disturbing the other parts or units of the entire shaft. This longitudinal body removement is accome plished by loosening the nut '31 and then remove: 'ing the bolt 33, whereupon not only can the cone collar be" removed from-thelarge cone socket 22;.

but the entire journal sleeve 23 can be slid through the socket 22, which is a very eflicient operation as the positioning of the supporting crank arms need not be interfered with, since they can retain their normal spaced relation, without any separating action of said crank arms being necessary. This novel connecting unit 6 permits easy repair of a sectional crankshaft construction according to the present invention because of the easy manipulation of the connecting units, and their ready accessibility to the mechanic.

The connecting units 6 are adapted for receiving roller bearings on their outer surfaces (not shown) Any style or form of roller bearings may be employed, common to this art, that the constructor or operator desires.

While I have described the preferred embodi-' to the wide end of .the small cone socket, a jourment of my invention and illustrated same in the accompanying drawing, certain changes or alterations may appear to one skilled in the art to which this invention relates during the extensive manufacture of same, and I, therefore, re

, serve the right to make such changes or altera a journal sleeve having a portion closing said small socket, said journal sleeve also having a portion extending into the large socket, means fastening said journal sleeve upon said crank arms, and said journal sleeve being adapted to bodily move out of said small socket and entirelyv through said large socket for removal of said crank'arms.

2,190,411 v 2. In a sectional crankshaft, the combination of a pair of crank arms provided with conical sockets of different diameters and extending in. the same directions, a journal sleeve in saidconical sockets, one end of said sleeve filling one conical socket, a cone sleeve around the other end of said journal sleeve and within a conical socket, said journal sleeve being'adapted to bodily move its entire length out'of said socket contain,

3. In a sectional crankshaft, the combination of a'pairof crank arms, one crank arm provided With a small conical socket and the other crank arm provided with a large conical socket, the narrow end of said large conical socket contiguous nal sleeve provided with a relatively thick primary cone end fitting snugly within said small cone socket, said primary cone endprovided with an annular shoulder fitting against thejside-face of a crank arm, said.- journal sleeve provided also with an auxiliary cone end, said auxiliary cone end being thinner than said primary cone end,

said auxiliary cone end fitting within said large, conical socket, a cone collar on said auxiliary cone ,end within said large conical-socket, the outer face or Wall of 'saidfcone collar registering at its inner end with the outer face 'of said journal sleeve, whereby said cone collar and'jour-e nal sleeve can be bodily. removed through said shaft, and means fastening saidjournal sleeve,-

THOMAS El ATrisoN. v

' large conical socket longitudinally of the crank-i cone collarand'the engaged crank'arms together. 35 

